<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表单</title>
</head>
<body>
<form action="#" method="get">
    用户名:<input name="username"/>
    <br/>
    密码:<input name="password" type="password"/>
    <br/>
    性别:<input name="gender" type="radio" checked value="1"/> 男
         <input name="gender" type="radio" value="2"/> 女
    <br/>
    <input type="submit" value="登录"/>
    <br/>
    <input type="button" value="一个按钮"/>
    <br/>
    <input type="image" src="image/icon_1.jpg"/>
</form>
</body>
</html>